Because "they" turn your lack of privacy into money. You're selling yourself for free.
Economic and psychological abuse angle:
Because "they" will attack you economically by psychologically targetting you with advertising for items you don't actually need, but they will manipulate you into thinking you do.
Creepy / Icky angle:
Because "they" create an electronic copy of you with all this data. With AI and other existing / future technologies they could create a version of you to populate their metaverse.
You can't trust your government angle:
"They" sell the electronic copy of you, and this can be bought by anyone, including governments. If the government of the day (which may change - boy howdy) don't like things you say or how you conduct yourself (or re-define what fraud and corruption mean), then they can target and harass you much more specifically when armed with all this extra information that's extracted from your electronic trails.
Because "they" turn your lack of privacy into money. You're selling yourself for free.
Economic and psychological abuse angle:
Because "they" will attack you economically by psychologically targetting you with advertising for items you don't actually need, but they will manipulate you into thinking you do.
Creepy / Icky angle:
Because "they" create an electronic copy of you with all this data. With AI and other existing / future technologies they could create a version of you to populate their metaverse.
You can't trust your government angle:
"They" sell the electronic copy of you, and this can be bought by anyone, including governments. If the government of the day (which may change - boy howdy) don't like things you say or how you conduct yourself (or re-define what fraud and corruption mean), then they can target and harass you much more specifically when armed with all this extra information that's extracted from your electronic trails.